Finely dice 4 shallots (or I use one onion) and fry for 1-2 minutes in a pan.
Make 9oz beef stock with Bovril. Mix in 2 teaspoons of mustard powder. Add this to the pan of onions/shallots.
Add 1 tablespoon of gravy granules and 1 tablespoon of peppercorns and stir on the heat for 1-2 minutes until slightly thickened.
Remove from the heat and stir in 2-3 tablespoons of natural fromage frais.